Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 15-08-2021 and time 20:17:11 (Italy) in region 3 km SW Oncino (CN)

A magnitude ML 1.4 earthquake occured in region: 3 km SW Oncino (CN), on

  • 15-08-2021 18:17:11 (UTC)
  • 15-08-2021 20:17:11 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.6630, 7.1630 at 11 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Oncino CN 3 76 76
Ostana CN 4 83 159
Crissolo CN 4 168 327
Paesana CN 9 2784 3111
Sampeyre CN 10 1022 4133
Casteldelfino CN 11 157 4290
Pontechianale CN 12 179 4469
Sanfront CN 13 2395 6864
Frassino CN 14 265 7129
Bellino CN 15 109 7238
Barge CN 15 7774 15012
Rorà TO 15 257 15269
Elva CN 15 97 15366
Rifreddo CN 15 1078 16444
Gambasca CN 15 371 16815
Bagnolo Piemonte CN 16 6024 22839
Villar Pellice TO 16 1076 23915
Bobbio Pellice TO 17 563 24478
Martiniana Po CN 17 734 25212
Envie CN 17 2074 27286
Melle CN 17 292 27578
Lusernetta TO 17 506 28084
Stroppo CN 18 103 28187
Revello CN 18 4262 32449
Bibiana TO 18 3442 35891
Macra CN 18 59 35950
Luserna San Giovanni TO 18 7395 43345
Torre Pellice TO 18 4551 47896
Brossasco CN 19 1084 48980
Isasca CN 19 76 49056
Valmala CN 20 52 49108
Celle di Macra CN 20 100 49208

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km NW of Cuneo (56081 inhabitants)
56 Km SW of Moncalieri (57294 inhabitants)
61 Km SW of Torino (890529 inhabitants)
86 Km W of Asti (76202 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 1.4 2021-08-15
18:17:11		 44.6633 7.1628 11 2021-08-15
18:22:23		 Sala Sismica INGV-Roma 94214961
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-15 18:17:11 ± 0.15
Latitude 44.6633 ± 0.0063
Longitude 7.1628 ± 0.0164
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 94214961

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1311
Semi-minor axis of confidence ellipse (meter) 187
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 78
Circular confidence region, given by single value of horizontal uncertainty (meter) 1310.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 122
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.45
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.73205
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 21
Type of magnitude ML
Reference to an origin 94214961
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-15 18:22:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
FR.SAOF.HHZ.00 2021-08-15T18:17:35.34 0.3 undecidable manual S 157 81.252 50 -0.57 57
MN.BNI.HHZ. 2021-08-15T18:17:29.21 0.1 undecidable manual S 319 57.5979 50 -0.37 85
GU.CANO.HHZ. 2021-08-15T18:17:29.00 3.0 positive manual P 0.62 0
IV.QLNO.HHZ. 2021-08-15T18:17:28.46 3.0 undecidable manual P -0.42 0
GU.RSP.HHZ. 2021-08-15T18:17:28.45 0.3 undecidable manual S 8 54.4011 50 -0.29 66
GU.ENR.HHZ. 2021-08-15T18:17:27.68 0.3 undecidable manual S 157 52.2033 50 -0.48 63
IV.MONC.HHZ. 2021-08-15T18:17:26.23 0.3 undecidable manual P 53 75.369 50 1.45 41
GU.STV.HHZ. 2021-08-15T18:17:26.61 0.3 undecidable manual S 164 48.2184 50 -0.47 64
FR.SAOF.HHZ.00 2021-08-15T18:17:25.83 0.3 undecidable manual P 157 81.252 50 0.15 67
GU.RRL.HHZ. 2021-08-15T18:17:24.72 0.1 undecidable manual S 314 40.9257 50 -0.44 86
GU.GBOS.HHZ. 2021-08-15T18:17:24.32 0.1 undecidable manual P 131 71.1732 50 0.2 90
MN.BNI.HHZ. 2021-08-15T18:17:22.63 0.1 undecidable manual P 319 57.5979 50 0.61 85
GU.ENR.HHZ. 2021-08-15T18:17:21.35 0.1 undecidable manual P 157 52.2033 50 0.15 94
GU.RSP.HHZ. 2021-08-15T18:17:21.60 0.3 undecidable manual P 8 54.4011 50 0.07 71
GU.STV.HHZ. 2021-08-15T18:17:20.92 0.1 undecidable manual P 164 48.2184 50 0.34 91
GU.BHB.HNZ. 2021-08-15T18:17:19.07 0.1 undecidable manual S 22 20.6682 50 -0.67 83
GU.RRL.HHZ. 2021-08-15T18:17:19.97 0.1 undecidable manual P 314 40.9257 50 0.5 90
GU.PZZ.HHZ. 2021-08-15T18:17:18.56 0.3 undecidable manual S 192 17.7711 121 -0.35 71
GU.PZZ.HHZ. 2021-08-15T18:17:16.10 0.1 undecidable manual P 192 17.7711 121 0.24 97
GU.BHB.HNZ. 2021-08-15T18:17:16.45 0.1 undecidable manual P 22 20.6682 50 0.11 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.PZZ.HHN. ML:1.8 0.0005245 0.14 AML other m 2021-08-15T18:17:19.59
GU.PZZ.HHE. ML:1.9 0.00063 0.18 AML other m 2021-08-15T18:17:20.04
GU.RRL.HHE. ML:1.5 0.00009765 0.86 AML other m 2021-08-15T18:17:24.51
GU.RRL.HHN. ML:1.5 0.00009725 0.16 AML other m 2021-08-15T18:17:25.14
GU.STV.HHE. ML:1.2 0.00004505 1.22 AML other m 2021-08-15T18:17:27.99
GU.STV.HHN. ML:1.1 0.00003685 1 AML other m 2021-08-15T18:17:27.24
GU.ENR.HHN. ML:1.4 0.0000619 0.74 AML other m 2021-08-15T18:17:28.54
GU.ENR.HHE. ML:1.6 0.00009175 0.36 AML other m 2021-08-15T18:17:28.92
IV.QLNO.HHE. ML:1.4 0.00002735 0.12 AML other m 2021-08-15T18:17:29.42
GU.RSP.HHN. ML:1.4 0.00006604999999999999 0.12 AML other m 2021-08-15T18:17:29.84
MN.BNI.HHN. ML:1.0 0.0000196 1.24 AML other m 2021-08-15T18:17:30.91
MN.BNI.HHE. ML:1.1 0.00002425 1.14 AML other m 2021-08-15T18:17:30.88
GU.RSP.HHE. ML:1.4 0.00005485 0.32 AML other m 2021-08-15T18:17:30.61
GU.GBOS.HHN. ML:1.3 0.0000286 1.16 AML other m 2021-08-15T18:17:32.70
GU.GBOS.HHE. ML:1.3 0.00003255 0.46 AML other m 2021-08-15T18:17:32.98
FR.SAOF.HHN.00 ML:1.0 0.000017250000000000003 1.16 AML other m 2021-08-15T18:17:36.13
GU.CANO.HHN. ML:1.7 0.0000494 1.1 AML other m 2021-08-15T18:17:42.57
IV.QLNO.HHN. ML:1.4 0.0000233 0.38 AML other m 2021-08-15T18:17:42.52
FR.SAOF.HHE.00 ML:1.2 0.00001925 0.56 AML other m 2021-08-15T18:17:43.29
IV.MONC.HHE. ML:1.5 0.00004725287 0.2432 AML other m 2021-08-15T18:17:44.03
IV.MONC.HHN. ML:1.5 0.000049932489999999996 0.2944 AML other m 2021-08-15T18:17:43.55
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download